index fossil Meaning in the Cambridge English Dictionary
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Meaning of “index fossil” in the English Dictionary

"index fossil" in British English

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index fossilnoun [C]

/ˈɪn.deks ˌfɒs.əl/  us /ˈɪn.deks ˌfɑː.səl/ specialized
a fossil that is ​found in many ​places and comes from the same ​time in ​history, so that ​scientists can use it to ​decide how ​oldcertainrocks are
(Definition of index fossil from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"index fossil" in American English

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index fossilnoun [C]

 /ˈɪn·deks ˌfɑs·əl/
earth science a fossil that is ​found in many ​places and comes from the same ​time in ​history, so that ​scientists can use it to ​decide how ​oldcertainrocks are
(Definition of index fossil from the Cambridge Academic Content Dictionary © Cambridge University Press)
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